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RE: Travel Time to Alpha Centauri - Python Program
Excellent stuff - most people don't understand time dilation when travelling close to light speed - your calculation would cover pretty much any distance you want to travel. When i did the sums 30 years ago i got 2 years at 1g to be near light velocity and as the journey time is then negligible, 2 years to slow down. As the relative journey time remains the same, i would opt for Proxima Centauri to look at the possible habitable planets. :)
The problem with Proxima Centauri is it flares regularly, one was recently recorded that increased the star's output by nearly 100 times that lasted a few minutes. It would be hard to imagine a planet around a star like that sustaining life, unless it was underground.